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Finding the Fourth Proportional to 398,646.65, 550,134.98 and 217,361.57

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Solution

The fourth proportional to 398,646.65, 550,134.98 and 217,361.57 is: 299,960.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,646.65 : 550,134.98 = 217,361.57 : x
  2. Step 2: Convert to fraction form
    398,646.65/550,134.98 = 217,361.57/x
  3. Step 3: Cross multiply
    398,646.65x = 550,134.98 × 217,361.57
  4. Step 4: Simplify right side
    398,646.65x = 119,578,202,964.72
  5. Step 5: Solve for x
    x = 119,578,202,964.72/398,646.65
  6. Step 6: Final answer
    x = 299,960.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.